baber/WOPTO huggingface dataset:
Patent GB-1230392-A (GB)
IPC: D01D5/06
Filed: 1968-06-25
Abstract: 1,230,392. Wet-spinning acrylic filaments having non-circular cross-sections. JAPAN EXLAN CO. Ltd. 25 June, 1968 [28 June, 1967], No. 30328/68. Heading B5B. Acrylonitrile filaments of non-circular crosssection having an R F  value of from 1À6 to 9À0 are produced by extruding a solution in a concentrated aqueous solution of an inorganic salt or salts of a polyacrylonitrile or of a copolymer of acrylonitrile with at least one ethylenically unsaturated monomer, which copolymer contains at least 50% by weight of acrylonitrile units, through a non-metallic spinneret formed from an inert material such as a synthetic resin, said material having a conductivity not exceeding 5Î10<SP>-3</SP> cal. cm.<SP>-1</SP> sec.<SP>-1</SP> deg.<SP>-1</SP> into an aqueous coagulating bath, the spinneret being provided with orifices of non-circular crosssection in which the ratio of the length of the long axis of the cross-section of the orifice to the length of the short axis thereof is 2 to 9, the temperature of the coagulating bath not exceeding 10‹ C. and that of the spinning solution being at least 30‹ C. higher than that of the coagulating bath and the "jet drafting" ratio S J  on extrusion satisfying the relationship 4 # R. J S J  in which S J  is defined as the ratio of the linear speed of travel of the coagulated filaments as they travel over and in contact with the first godet they meet after leaving the coagulating bath to the average linear velocity of the spinning solution passing through the orifice. The spinning may be carried out under conditions which satisfy the relationship R F  = 0À4 R J .S J  in which R F  is the ratio of the long axis of the filament cross-section to the short axis thereof. The value of R F  may be 2 to 6. The inorganic salt may be ammonium, sodium, potassium or calcium thiocyanate or zinc or calcium chloride or perchlorate. The spinneret may be made of a synthetic resin which does not exhibit thermal deformation until it is heated to 70‹ C. or above and which has a bonding strength of at least 700 kg./cm.<SP>2</SP> when measured by ASTM methods D648 and D790 respectively. The spinneret may be made of a paper reinforced phenolic resin or an epoxy resin. In the two examples the spinning solution is prepared by dissolving a copolymer consisting of 91% by weight of acrylonitrile and 9% by weight of methyl acrylate in a 44% aqueous solution of sodium thiocyanate, the polymer concentration in the spinning solution being 11À3%.
Patent GB-1231200-A (GB)
IPC: H01H19/58
Filed: 1967-10-19
Abstract: 1,231,200. Rotary switches; contacts. PLESSEY CO. Ltd. 14 Oct., 1968 [19 Oct., 1967], No. 47732/67. Heading H1N. A printed-circuit switch wafer for use in a rotary switch comprises a ring of contact pads 3, 4 for engagement by a contact on a rotor and having conductors 5, 6 extending therefrom, the pads 3, 4 and conductors 5, 6 having selectively removable interconnecting parts 7, 9. Intermediate pads 10 with selectively removable interconnections 11 may also be arranged for a " make " before " break " switch. A rotor 12, Fig. 2, for carrying contact bridge 14 extending between the pads 3, 4 has radial slots 13 with projections 16 over which arms 15 of the bridge 14 are clipped to retain coil springs 17. Deformations 20 provide a line contact on the pads 3, 4.
Patent GB-1239145-A (GB)
IPC: F01P3/02
Filed: 1969-03-21
Abstract: 1,239,145. I.C. engine cylinders.  MASCHINENFABRIK AUGSBURG-NURNBERG A.G. March 21, 1969 [April 27, 1968], No. 15072/69. Addition to 1,192,027. Heading F1B. In an I.C. engine cylinder as claimed in parent Specification the walls of the exhaust slots are provided with a coating or lining of plastics material which presents a non-stick surface having a lower co-efficient of friction than that of the wall without the coating or lining. The plastics may be polytetrafluoro-ethylene and the walls of the inlet slots may be lined with a metal foil coated with the plastics.
Patent GB-1251459-A (GB)
IPC: B60P1/44
Filed: 1969-12-01
Abstract: 1,251,459. Load lifting vehicle tailboard. K. SCHMITT. 1 Dec., 1969 [2 Dec., 1968], No. 58586/69. Heading B8E. A tailboard 20 is mounted on a vehicle 2 by a parallel linkage 9, 10 to a connecting link 16 of which it is pivoted at 14. Compression springs 21 aid the pivoting of the tailboard to its vertical positon 20<SP>1</SP>. The tailboard is raised and lowered by a cable or chain 17 connected to the upper link 9 near the tailboard 20 and taken to a drum or chain wheel 6 driven by an electric motor controlled by a circuit which connects a series winding for raising the tailboard and a shunt winding for lowering which also produces regenerative charging of the battery. The cable or chain 17 may pass over a pulley on the link 9 and then be connected to the vehicle frame. The pivot 13 of the link 10 may be adjustable in a bracket 8 so that the tailboard may become inclined as it reaches the ground. A pressure roller may hold the cable 17 on the drum 6 if the cable becomes slack. Limit switches may be provided. A solenoid operated brake is provided.
Patent GB-1257439-A (GB)
IPC: C08K5/205
Filed: 1970-06-19
Abstract: 1,257,439. Stabilized polyurethanes. KURARAY CO. Ltd. 19 June, 1970 [27 June, 1969], No. 29987/70. Heading C3R. Elastomers containing urethane or urea linkages are stabilized against discoloration by the incorporation therein of from 0À1-20 weight per cent of a benzophenone of the formula where R 1  is an alkyl C 8-20  radical, R 2  and R 3  each represent a hydrogen atom (but not simultaneously) or a hydroxy group and R 4  is a hydrogen or halogen atom or an hydroxy, alkyl C 1-20  or alkoxy C 1-20  radical. In example (1) a polyurethane isomer derived from polybutylene adipate, 4,41-diphenyl methane diisocyanate and 1,4-butane diol is stabilized with 4-N-octyl carbamoyloxy - 2 - hydroxybenzophenone; with an antioxidant derived from n-octyl isocyanate and 4,4<SP>1</SP>-butylidene-bis-(3-methyl- 6-tert-butylphenol) (2) a polyurethane derived from polytetramethylene glycol and 4,4<SP>1</SP>- diphenylmethane diisocyanate is stabilized with 4 - N - octylcarbamoyloxy - 2 - hydroxy - 4<SP>1</SP>- methyl benzophenone and the antioxidant referred to above.
Patent GB-1264117-A (GB)
IPC: B03D1/20
Filed: 1968-03-11
Abstract: 1,264,117. Froth flotation process. ENGLISH CLAYS LOVERING POCHIN & CO. Ltd. 7 March, 1969 [11 March, 1968], No. 11856/68. Heading B2H. In a froth flotation process for purifying mineral ores, an aqueous mineral slurry containing a defluocculant and a collector and having a solids content of at least 30% by weight is conditioned for a time sufficient to dissipate in the slurry at least 25 horsepower hours of energy per ton of mineral solids and is then introduced into a froth flotation cell having a central, internal, submerged impeller having a peripheral speed of at least 2,000 feet per minute. The deflocculant may be sodium silicate, and the collector, a C 8-20  fatty acid such as oleic acid or lauric acid. Ammonium hydroxide may be added, and an activator, preferably a water-soluble salt of an alkaline earth metal or of a metal having a specific gravity greater than 4, may be used. Frothing may be induced by addition of pine oil or a lower alkyl ether of polyproylene glycol. The froth flotation cell comprises an impeller 1 mounted beneath a hood 7 and driven by belt gearing 4 from an electric motor 2. The process may be carried out in a number of similar froth flotation cells connected in series (Figure 2, not shown).
Patent GB-1264977-A (GB)
IPC: A41C1/02
Filed: 1969-03-07
Abstract: 1,264,977. Girdles. WACOAL Inc. 7 March, 1969, No. 12070/69. Heading A3V. A panty girdle is formed with a girdle body B of two-way stretch material, a symmetrically disposed window C on the front side and a front piece A of two-way stretch material having substantially the shape of the window but of smaller area, the front piece being attached by sewing to the girdle body B along the edges of the window to close the window. After attachment, the front piece A presents a concave outward surface, which expands outwards when the girdle is worn. The front piece A may have a dart or stitched seam, and may be formed in one piece or from two separate pieces with inwardly curved edges sewn together, Figs. 5a, 5b (not shown). Alternatively, the front piece A may be shorter in height than the window C, Fig. 6b (not shown) and/or may have inwardly curved outer edges, Figs. 4, 5a, 6a (not shown). It may also be of honeycomb cell shape, formed by cutting out pieces near the horizontal apices of the diamond, or of elliptical shape with vertical major axis. Suitable material for the girdle is a "Spandex" net or two-way stretch cloth such as "Tricot".
Patent GB-1265886-A (GB)
IPC: G03C5/38
Filed: 1969-06-24
Abstract: 1,265,886. Triazine derivatives. AGFAGEVAERT A.G. 24 June, 1969 [27 June, 1968], No. 31747/69. Heading C2C. [Also in Division G2] Compounds of the formula wherein R, R<SP>1</SP>, R<SP>2</SP> and R<SP>3</SP> are each hydrogen and R<SP>4</SP> is 2-hydroxyethyl or 3-dimethylaminopropyl are made respectively by (i) heating ethanolamine with thiourea and paraformaldehyde and (ii) heating 1-amino -3 -dimethyl - aminopropane with formalin and thiourea.
Patent GB-1295130-A (GB)
IPC: H02H3/33
Filed: 1970-07-08
Abstract: 1295130 Earth leakage protective arrangements HARVEY HUBBELL Inc 8 July 1970 33122/70 Heading H2K An earth leakage protective arrangement includes a capacitor 84 which is charged from a D.C. supply 32, 34 through a diode 88 during the periods in which a shunt circuit, e.g. including a transistor 70, is changed from a low to a high impedance state by a control signal dependent on the difference between the currents in lines 10, 12 to a load 18, the capacitor when sufficiently charged causing the operation of a relay 40, 16. In the arrangement shown, current induced in the secondary winding 24 of a core-balance transformer 20 causes a transistor 48 to conduct during those portions of alternate half-cycles when the induced current exceeds a predetermined value. When the transistor 48 conducts, it causes a Schmitt trigger 68, 70 to change its state so that the capacitor 84 charges. When the potential across the capacitor 84 is sufficient, a unijunction transistor 90 conducts to trigger a controlled rectifier 44. This rectifier conducts to energize the relay 40 which opens its contacts 16 to disconnect the load 18, the relay remaining energized until a reset switch 42 is opened. A test circuit 96, 98 is provided.
Patent GB-1308150-A (GB)
Title: Receivers for phase comparison radio navigation systems
IPC: G01S1/30
Filed: 1969-11-10
Abstract: 1308150 Radio navigation DECCA Ltd 11 Nov 1970 [10 Nov 1969] 54973/69 Heading H4D  The description is the same as in Specification 1,308,147 but the claims relate to the production of the local oscillator frequencies for superheterodyne reception whereby phase comparison takes place at fixed frequencies irrespective of the actual radiated frequencies.
Patent GB-1314554-A (GB)
Title: Toe and fingernail clipping collector
IPC: A45D29/02
Filed: 1970-10-12
Abstract: 1314554 Manicuring appliances P S A RANDALL 26 Aug 1971 [12 Oct 1970] 48294/ 70 Heading A5R A toe and finger nail clipping collector comprises a plastics bag formed of a transparent front sheet and an opaque back sheet which is longer than the front sheet to form a flap adjacent the bag mouth, two spaced apertures in the front sheet to allow the user to pass one hand through each aperture into the bag so that finger nails, or toe nails of feet passed into the bag via its mouth, can be clipped within the bag, and a container removably attached, preferably by screw threads, to a corner of the bag for receiving the nail-clippings.
Patent GB-1314990-A (GB)
Title: Doppler radar systems
IPC: G01S13/536
Filed: 1970-08-14
Abstract: 1314990 Intruder alarms ALARM EQUIPMENT SUPPLIES Ltd 10 Aug 1971 [14 Aug 1970] 39339/70 Heading G4N [Also in Division H4] A CW Doppler radar receiver includes a selfoscillating mixer providing beat signals to a frequency discriminator whose output supplies a trigger circuit operative if the signals exceed a predetermined amplitude or duration. In a security alarm a Gunn diode mounted in a resonant wave guide cavity acts as transmitter and mixer. The cavity is coupled to the radar horn and beat signals are passed to a tuned amplifier peaking at 40-50 Hz. A threshold circuit converts the beat signals to pulses which pass to a diode pump arrangement which triggers an alarm if a predetermined number of pulses is received. Specification 1,277.942 is referred to.
Patent GB-1316115-A (GB)
Title: Suction cleaners
IPC: A47L9/04
Filed: 1969-09-30
Abstract: 1316115 Suction cleaners BRITISH DOMESTIC APPLIANCES Ltd 29 Sept 1970 [30 Sept 1969] 48036/69 Heading A4F A rotary agitator for a suction cleaner comprises at least one brush element 4 having spigots 7 projecting through openings 3 in the wall of a substantially cylindrical hollow shell 1 and held in place by retaining means engaging surfaces of the spigots 7 within the shell 1. In the embodiment illustrated in Fig. 1 the spigots are of T-shaped and the retaining means comprises a channelshaped plastics strip 9 having inturned edges 11 engaging between the transverse arms 8 of the spigots 7 and the wall 2 of a depression in the shell 1 which receives the plastics strip 5 which carries the brush bristles 6 in one or more row or rows. An alternative embodiment is described in which the strip 5 carries two rows of bristles 6 and is held in place by a rod 13 Fig. 3 (not shown) which passes through openings in the spigots 7 which are of rectangular axial section. In both embodiments the brush element may extend either straight along or helically around the shell 1.
Patent GB-1317050-A (GB)
Title: Electrical discharge system for use with oxidising gases
IPC: H05H1/34
Filed: 1970-12-31
Abstract: 1317050 Plasma torch MANSFELD KOMBINAT WILHELM PIECK VEB 31 Dec 1970 61945/70 Heading H5H To prevent the working gas e.g. an oxidizing gas such as air of a plasma blow torch from swirling over the face of the cathode insert 1 and wearing away the mechanically unstable oxide coating formed thereon, the working gas is divided into two streams, a main stream which swirls about the arc 11 to constrict it and a subsidiary stream which is introduced near the face of insert 1 to swirl in the opposite direction and cooperate with the main stream to produce substantially stationary gas zone at the face of insert 1. As shown the gas is divided by a guide ring 8 provided with rows of gas ducts 9 and 10 which produce oppositely swirling subsidiary and main gas flows. Alternatively, Figs. 2 and 3 (not shown), part of a swirling gas stream introduced into the arc chamber is deflected by baffle surfaces provided on the lower surface of cathode mount 2 to swirl in the opposite direction to the undeflected mainstream and cooperate therewith to produce the stationary gas zone at the face of cathode insert 1. The insert 1 is zirconium galvanically coated with copper or silver and is friction welded to the copper mount 2. A cooling tube 5 extends into the mount 2 between an upstanding collar 4 and its outer wall. A nozzle cap 13 surrounds nozzle 6 and is supplied with coolant. The torch is started in the non-transferred mode but works in the transferred mode for cutting. It may work in the non-transferred mode.
Patent GB-1328506-A (GB)
Title: Belting systems
IPC: B65G47/50
Filed: 1970-11-23
Abstract: 1328506 Endless belt conveyers DUNLOP HOLDINGS Ltd 23 Nov 1970 [3 Dec 1969] 58958/69 Heading B8A [Also in Division B5] A belting system comprises an endless belt consisting of flexible polymeric material such as rubber and an embedded reinforcement structure formed at least in part by closely spaced strands of magnetizable material (especially steel, or brass-plated steel, wire) of thickness 0À002-0À025 inch and extending transversely of the belt, drive and support rollers for the belt, means for applying a magnetic field to magnetise the strands and detector means for detecting the magnetized strands. The belt may be coded by a binary or analog signal adjacent to an object loaded thereon and the detector means then senses the correct place for off-loading. A cancellation unit such as an A.C. coil for demagnetizing the wires may be placed after the detector. The strands may extend longitudinally as well as transversely of the belt and may be supported on a glass fibre mat, a layer of uncured rubber being applied to one side of the assembly and a woven textile to the other, followed by curing of the rubber in a heated press.
Patent GB-1330487-A (GB)
Title: Treatment of waste gases
IPC: B01D53/52
Filed: 1971-10-27
Abstract: 1330487 Treatment of waste gases; sulphur BRITISH GAS CORP 27 Oct 1971 [27 Oct 1970] 51061/70 Heading C1A Sulphur is obtained from a gaseous mixture containing hydrogen sulphide and sulphur dioxide by contacting the mixture in a reactor with a catalyst comprising oxides of cobalt and molybdenum. The catalyst may be supported on a carrier such as bauxite, corundum, active alumina, silica, kaolin, powdered brick, an alkaline earth metal oxide or mixtures thereof. The cobalt oxide is preferably present in amounts of 1-4%, and the molybdenum oxide in amounts of 11-16%, both by weight of the total weight of the catalyst. Any carbon dissulphide or carbon oxysulphide present in the gas stream may be be converted into hydrogen sulphide by steam in the presence of the specified catalyst composition. The process is particularly applicable to Claus kiln effluents. Any hydrogen sulphide remaining may be eliminated by washing with a solution of sodium vanadate and the sodium salt of anthraquinone disulphonic acid (Stretford process) or by passage over zinc oxide; the last traces of sulphur dioxide may be removed by washing with sodium carbonate solution.
Patent GB-1339138-A (GB)
Title: Dental filling syringe
IPC: A61C5/62
Filed: 1970-12-17
Abstract: 1339138 Discharging fluids W B DRAGAN 17 Dec 1970 60060/70 Heading F1R [Also in Division A5] A syringe for dental filling material comprises a carrier 10 and an applicator gun 12, the gun comprising a barrel 12A to one end of which the carrier is detachably connected, the carrier having a piston 13 slidable therein, and a plunger 19 slidable within the barrel and having a projection 21 on its end which can engage with the piston 13 to discharge filling material from the carrier. The carrier may be made from disposable plastics and has a tubular reservoir portion 10A, and a discharge tip 10B which progressively diminishes in cross-section from inlet to outlet, and has an orifice 14 at its outlet end. Alternatively its outlet end may be closed The barrel has an end wall 16 having a hole 17 through which the carrier is fitted to the end wall. Alternatively the end wall may be replaced by a cap detachably screw threaded or hinged to the barrel, for fitting the carrier. The carrier may be made from transparent material. The tip 10B is angularly disposed relative to the reservoir 10A. A finger grip 22 is connected to the barrel.
Patent GB-1339826-A (GB)
Title: Apparatus for moving scenery
IPC: A63J1/02
Filed: 1971-07-08
Abstract: 1339826 Scenery moving apparatus MOLE RICHARDSON (STAGE & STUDIO ENG) Ltd 7 July 1972 [8 July 1971] 32102/71 Heading A6M Scenery raising and lowering apparatus comprises a vertical hydraulic cylinder 1 having a piston defining upper and lower spacer therein, a piston rod 2 extending upwards from the cylinder and operatively connected to a pulley system 5-11 having a velocity ratio of 4 and being adapted to raise or lower scenery 13, the hydraulic cylinder being operated by pressure fluid supplied to the upper space thereof. The cylinder is supported by a single pivot only and the pulley system is supported by a bracket 7 secured to wall 3. The supply of fluid to and drain from the cylinder is controlled by a spool type directional valve (28) in a conventional hydraulic system - Fig. 2 (not shown). The valve is operated from a control box 32 having an operating lever 34 connected by crank 35 to valve linkage 23, (22). In the control box, Figs. 3 and 5, the lever 34 is connected via a sleeve 46 to an axially moveable rod 47, the sleeve 46 being adjustable as to its position on rod 47. The rod 47 has a centreing spring 49 and carries adjustable stops 54, 57 and the position of the sleeve 46 can be used to set the speed of raising or lowering the scenery by positioning the lever 34 and thus determining the amount the control valve (28) is opened. Also in the control box 32 is a drum 59 rotatable by the wire 29 wrapped therearound the ends of the wire being connected via pulleys 31 (Fig. 1) to a member 36 connected to the piston rod 2. Thus movement up and down of scenery 13 rotates the drum 59 which rotates screw 37. The latter carries a non-rotatable nut 38 which thus moves up and down according to the position of the scenery and this can be indicated on a suitable scale by pointer 41. The screw also drives a 'fine' position indicator 43. Engagement of the nut with either of stops 53, 54 moves rod 47 axially to move the lever 34 to its central position to centralise the control valve (28) and thus cease the motion of the piston and thence the scenery 13.
Patent GB-1340105-A (GB)
Title: Aids for deaf persons
IPC: H04R25/04
Filed: 1971-06-08
Abstract: 1340105 Hearing aids NATIONAL RESEARCH DEVELOPMENT CORP 6 June 1972 [8 June 1971] 19476/71 Headings H4J and H4R In an aid for deaf persons (i.e. a hearing aid or a speech training aid) sounds in a first speech frequency range are converted into sounds in a second speech frequency range, the frequency differences of the first range being substantially maintained in the second range, and the converted sounds are superimposed on sounds in the second range. For example, speech components in the range 4000 c.p.s. to 5000 c.p.s. may be changed to have frequency components from 0 to 1000 c.p.s. and be superimposed upon speech components below 1000 c.p.s. An electrical input signal fs (Fig. 2) from a microphone (not shown) is applied to two signal paths 2 and 3. Path 2 includes a frequency modulator 4 of frequency fc, which gives sum and difference output signals fc+fs and fc-fs. A single side band filter 5 passes only a selected range of the modulated signals. Output signal fs<SP>1</SP> from filter 5 is passed to a demodulator 6 where the output signal is demodulated by a signal fc<SP>1</SP> to give an output signal fs<SP>1</SP>-# (where #=fc<SP>1</SP>-fc). Path 3 includes a pre-amplifier 7 and amplifier 8 for signal fs. The signal fs<SP>1</SP> - # passes to amplifier 8 by way of a resistor 9 and is superimposed upon the pre-amplified input signal fs within amplifier 8. The amplified signal fs+(fs<SP>1</SP> - #) from amplifier 8 passes by way of a filter arrangement 10 and an amplitude compressor 11 to a loud-speaker or earphone (not shown). The filter arrangement 10 may comprise a plurality of filters 10a, 10b, 10c controlled by a switch 10d, for selection according to the requirements of a deaf person. Alternatively, a single filter may be provided, tailored to the requirements of the user. A conventional group hearing aid or group speech training aid may have a module comprising the circuit of Fig. 2 connected to its auxiliary input connector. In a speech training aid both direct and recorded speech may be reproduced. Visual and/or tactile aids may also be provided and may be controlled by the changed electrical signal or such changed electrical signal superimposed upon the unchanged electrical signal.
Patent GB-1346985-A (GB)
Title: Frangible struts
IPC: A62C37/08
Filed: 1970-01-30
Abstract: 1346985 Frangible phials S E PICKERING 19 April 1971 [30 Jan 1970] 4576/70 Heading A5A A frangible strut for an overhead sprinkler consists of a liquid-containing'phial constructed to rupture within a specified temperature range, and colour-coded by the inclusion of small particles of a material which is naturally coloured or coloured in the mass and is insoluble in the liquid filler and inert with respect to its function as a temperature sensor. The colour must be fast. The particles may be coloured sand or silica, or glass spheres, e.g. blue glass beads of 0.25 mm. diameter.